Images
Markdown
 
Re sizing images in Markdown is required if you are knitting to a pdf - because you can’t use HTML code.
Tip and tricks for workign wtih images and figures in R Markdown documents - hollie@zevross.com
Adjust the out.width and out.height in the R chunk options
{r, out.width="50%"}
img <- "Peegs.jpg" #path to image
knitr::include_graphics(img) #in the knitr package
HTML in markdown
In my opinion, HTML is a lot easier to use for images options.
<img src="Peegs.jpg" alt="this is Daffodil and Blossom" width="50%">